New York prosecutors sought Friday to keep their murder case going against Luigi Mangione, arguing that his federal guilty plea should not end a separate state-court case over the killing of UnitedHealthcare CEO Brian Thompson.
In a court filing, Manhattan Assistant District Attorney Joel Seidemann and colleagues contended that the state and federal prosecutions center on "different harms, different evils, different purposes, different crimes."
Mangione's defense lawyers are attempting to get the state murder and weapons charges thrown out, citing double jeopardy—the legal principle that broadly prevents a person from being repeatedly prosecuted for the same crime. The application of double jeopardy can become complicated and disputed when different courts are involved.
In response to prosecutors' filing Friday, Mangione's attorneys pointed to their own previous court papers arguing that the state and federal governments are "prosecuting the same man twice for the same event."
The case centers on Thompson's death. Mangione appeared for a pre-trial hearing at Manhattan Criminal Court on August 11, 2026.
A ruling on the double jeopardy question is expected, though the sources do not specify a timeline for the court's decision.